An armed man gestures as buildings and cars are engulfed in flames inside the U.S. consulate compound in Benghazi, Libya. Warning: The next photo in this gallery contains an image that may be disturbing to some readers.

An armed man gestures as buildings and cars are engulfed in flames inside the U.S. consulate compound in Benghazi, Libya. Warning: The next photo in this gallery contains an image that may be disturbing to some readers. (AFP/GettyImages)

In this photo posted on the Facebook page of the U.S. Embassy in Tripoli, Libya, less than a month before he was killed, U.S. Ambassador to Libya J. Christopher Stevens, left, shakes hands with a Libyan man in Tripoli.

In this photo posted on the Facebook page of the U.S. Embassy in Tripoli, Libya, less than a month before he was killed, U.S. Ambassador to Libya J. Christopher Stevens, left, shakes hands with a Libyan man in Tripoli. (U. S. Embassy Tripoli)